A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

These giant metal horses graze on a hilltop near the Montana highway.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

Mining caused an asbestos emergency in this small town.

An obscure waterfall that looks like something out of a fantasy novel.

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.

The mayor made the declaration in 2004.

This playground sculpture of an icon from the past is dedicated to the children of the future.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.